Electrical attachment plug



y 30, 1933- M. H. KAEFER 912,147

ELECTRI CAL ATTACHMENT PLUG 7 Filed June 18, 1931 INVENTOR. Max-fin H Tmann Kauai-er.

ATTO Y.

Patented May 30, 1933 UNITED STATES PATENT MARTIN HERMANN KAEFER, or PERU, ILLIIvoIsAssIeNoR '10 'wnsTnniv o oc ooM-j PANY, or PERU, ILLINOIS, A conroim rro vor ILLINOIS ELECTRICAL ATTACHMENT PLIIG Application filed June 18,

My invention relates to electrical attachment plugs and has for its object the production of such an attachment plug that is made up of a few extremely simple and interchangeable parts that can be produced at an exceedingly low cost, one part of which can be readily and inexpensively assembled in a molded insulating casing and-the other just as simply and inexpensively mounted on insulating material, making the whole attachment device an excellent complete means for accomplishing its purpose at an extremely low cost.

I accomplish these results by the means shown in the accompanying drawing in which,

Fig. 1 is a top view of my completely assembled attachment ,plug.

Fig. 2 is a side view of same.

Fig. 8 is a front view of the projecting or male member of my attachment plug.

Fig. 4 is a sectional view of Fig. 3 along a line 11.

Fig. 5 is a front view of the co-operating or female part of my attachment plug.

Fig. 6 is a top view of the co-operating or female part of my attachment plug with top insulating part removed showing the conducting elements.

Fig. 7 is a partial cross sectional View along a line 22 of Fig. 1.

Similar numerals represent the same parts throughout the several views.

In the drawing 1 represents a piece of insulating material in which is mounted and fastened the conducting pins 2 by means of the threaded part 3 on pin 2 and the nut 4 which is riveted in an aperture in 1 as shown. 5 is a hexagonally shouldered part or nut formed on pin 2 on which a wrench can be used to securely lock this part 5 against the nut 4 thus leaving the pin 2 projecting from the insulating piece 1. Pin 2 has a notch 6 formed in same and also has its projecting end rounded off as shown. Insulating piece 1 has the plurality of apertures shown by means of which it is fastened to the usual electrical device to be supplied with electrical current. The wire conducting the current from pin 2 may be fastened 1931: "Serial No. 645,233.

to the nut 4 in any of the usual ways or may be clamped between the nut 5 on 2 and the nut 4 in the usual manner.

gether by means of the bolt 8 and the nut 9.

When thus assembled the parts 7 have an aperture into which fits the cable 10 which has the two wires 11 and 12 whose ends arebent at an angle of 90 to said cable, said ends being in the same straight line. Fastened on each of said wire ends is a larger U shaped resilient contacting part 13 by means of a smaller U shaped part 14 that registers with each of said wire ends. Each leg of said larger U shaped contacting part is so curved that the corresponding convex parts 15 practically approach each other and further forming the flared opening end shown (see Fig. 7) so that the pin 2 can readily enter its co-operating contact part. The notch 6 in contacting pin 2 and the parts 15 of the co-operative contacting parts are so positioned that when the pin 2 is completely entered they register and thus form a means for resiliently holding the parts in operative position.

It will be understood, of course, that while I have here shown one form of my invention I do not wish to limit myself to the exact form shown but desire to have it taken in a sense illustrative of any or all the forms of same that come fairly within the scope of the appended claims.

I claim:

1. In an electrical attachment plug, the combination of a projecting conducting stud having a notch, a larger resilient U-shaped conducting member having angularly shaped having a notch, a larger resilient U-shaped conducting member having angularly shaped ends that firmly re ister in said notch on said projecting con ucting stud when said parts are operatively assembled, a smaller U-shaped art formed in the base of said larger U-s aped member substantially centrally disposed to the sides of same, a conducting wire fastened within said part and an insulating container comprising two sim ilarly formed pieces with fastening means associated with said U-shaped member and said conducting wire.

MARTIN HERMANN KAEFER. 

